(19)

(11)

EP 0 099 927 A1

(12)

(43) Date of publication: 08.02.1984 Bulletin 1984/06 (21) Application number: 83901019.0 (22) Date of filing: 10.02.1983

(51) International Patent Classification (IPC):  C25D 3/ 56( . ) C25D 5/ 26( . ) (86) International application number: PCT/US1983/000180 (87) International publication number: WO 1983/002785 (18.08.1983 Gazette 1983/19)

(84) Designated Contracting States: BE FR (30) Priority: 11.02.1982 US 19820347704 (71) Applicant: NATIONAL STEEL CORPORATION Pittsburg, Pennsylvania 15222 (US)	(72) Inventors: AUSTIN, Lowell W. Weirton, WV 26062 (US) STODDART, James O. Clinton, PA 15026 (US) (74) Representative: Rinuy, Guy, et al  Cabinet Rinuy et Santarelli 14, Avenue de la Grande Armée F-75017 Paris F-75017 Paris (FR)